It
comes in response to a police raid on the Northwest Side home of Kevin
J. Long after he was arrested in March for allegedly bringing four
hunting knives into the Daley Center, which houses courtrooms where
civil and traffic cases are heard.

Those knives were metal, but
among the 1,600 knives later seized in his home, about 100 were made of
fiberglass-reinforced plastic, said First Assistant Chief Deputy Sheriff
Kevin Connelly. Long was on a list of people deemed potential threats
against courthouse officials, officials said.

If someone walked through a metal
detector with one of the weapons, some of which are sold on the
Internet as letter openers for less than $15, the knife would not be
discovered, Connelly said.